Don't forget the executive elevator algorithm (EEA), which uses a priority interrupt to take passengers directly to the top floor.
Also need to make sure you increase the speed going past floors 4 and 13 to avoid bad luck.
Show HN: Elevators
31–40 of 426 posts
Re: Show HN: Elevators
#32I think this comparison is also assuming the distribution of request & requested floor is uniform? When actually near pairs are less likely (I'll just take the stairs) than bottom to top, so even analysing it is more complex than at first glance.
Re: Show HN: Elevators
#33did he factor in the lifting speed?
Re: Show HN: Elevators
#34The biggest problem I always have with elevators is not the algorithm, it's the people seemingly being unable to grasp the concept of pressing either the up or the down request button, depending on where they want to go. Almost always I find someone will press both, because "then the elevator comes faster". Completely ignoring the fact that they end up going the wrong way first half the time, and adding an unnecessar…
I don't think I've ever seen someone do that
I haven't ever seen anyone do this in the United States, but I saw it in China and Italy.
Re: Show HN: Elevators
#35Makes me want to play Sim Tower again. There’s something so satisfying about watching a machine just dutifully work through queued tasks like this.
I had another game in mind.
Re: Show HN: Elevators
#36I've never really liked Destination Dispatch elevators. Besides struggling to find the car I've been assigned to, sometimes you really have to hustle across the lobby to catch it. Then you also run into visitors that assume it's a normal car and can hit a floor button when the get in, only to realize they've walked into a car without buttons.
What makes me more peeved about destination dispatch elevators are people who aren't used to them, and all pile into an elevator without hitting a floor, thinking one input is enough for everyone. Then, a totally full elevator stops at intermediate floors to pick up callers, but there's no room to get in. If everyone put the floor in as they arrive to the elevator lobby, then the elevator would know how many people a…
The elevators I've seen have a "group call" feature slightly hidden in the menu.
Re: Show HN: Elevators
#37This is absolute catnip to me. Fantastic job to the author! It really scratches the itch of wanting to understand elevator dispatch algos!
I want something similar for advanced sensor stop lights...
I've long toyed with creating an elevator simulator game, but every time I build a prototype I realize it's not that fun to manually dispatch elevators, and playing with algos only goes so far! Elevator Saga is great for the programming side: https://play.elevatorsaga.com/
Re: Show HN: Elevators
#38You have no idea how excited I was to see this article today. I've long been fascinated with elevators and the algorithms that control them. Thank you!
Re: Show HN: Elevators
#39Hah, I thought a lot about this problem while developing Sky Lobby, a mobile game (iOS / Android) about controlling and automating elevators. In the game, some of the elevators are automated, and I wanted to choose an algorithm that best aligned with what players would expect an elevator to do. I ended up going with something close to LOOK, which (as the article states) is mostly what people expect. Except in case of…
Thanks for sharing this. I was just commenting about the challenge of making a fun elevator sim game. This looks great -- can't wait to play with it this weekend!
Re: Show HN: Elevators
#40Earlier quoted context omitted.
I don't think I've ever seen someone do that
I haven't ever seen anyone do this in the United States, but I saw it in China and Italy.
I've never seen anyone do this anywhere in the world including Italy.
I've never been to China but wouldn't you learn quickly after getting in an elevator going the wrong way not to do that again?
The only exception I can see if there's way more people than elevators and you just need to get spot at all costs.